/*
 * kylin-os-manager
 *
 * Copyright (C) 2022, KylinSoft Co., Ltd.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "utils.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <QtDBus/QDBusConnection>
#include <QtDBus/QDBusMessage>
#include <QtDBus/QDBusInterface>
#include <QtDBus/QDBusObjectPath>


///////////////////////////////////////////////////////////////////////////////
// The Utils class

Utils::Utils() {}

int Utils::m_system(char *cmd)
{
    int status = 0;
    pid_t pid;
    clock_t start, finish;
    if ((pid = vfork()) < 0) {
        qDebug() << "failed to create a subprocess by using vfork";
        status = -1;
    } else if (pid == 0) {
        const char *new_argv[4];
        struct sigaction sa_cld;
        sa_cld.sa_handler = SIG_DFL;
        sa_cld.sa_flags = 0;

        // 在子进程中放开SIGINT信号
        sigemptyset(&sa_cld.sa_mask);
        sigaction(SIGINT, &sa_cld, NULL);
        sigaction(SIGQUIT, &sa_cld, NULL);

        new_argv[0] = "sh";
        new_argv[1] = "-c";
        new_argv[2] = cmd;
        new_argv[3] = NULL;

        // execl("/bin/sh","sh","-c" ,cmd,(char *)0);
        start = clock();
        if (execve("/bin/sh", (char *const *)new_argv, NULL) < 0) {
            qDebug() << "failed to execve a shell command in function m_system";
            exit(1);
        } else {
            exit(0);
        }
    } else {
        waitpid(pid, &status, 0);
        finish = clock();
    }
    // double duration = (double)(finish-start)/CLOCKS_PER_SEC;
    // qDebug()<<"It takes "<<QString::number(duration)<<" seconds to execute command:"<<cmd;
    return status;
}

void Utils::onRequestSendDesktopNotify(QString message)
{
    QDBusInterface iface("org.freedesktop.Notifications", "/org/freedesktop/Notifications",
                         "org.freedesktop.Notifications", QDBusConnection::sessionBus());
    QList<QVariant> args;
    args << (tr("Kylin NM")) << ((unsigned int)0)
         << QString("/usr/share/icons/ukui-icon-theme-default/24x24/devices/gnome-dev-ethernet.png")
         << tr("kylin network applet desktop message") //显示的是什么类型的信息
         << message                                    //显示的具体信息
         << QStringList() << QVariantMap() << (int)-1;
    iface.callWithArgumentList(QDBus::AutoDetect, "Notify", args);
}


///////////////////////////////////////////////////////////////////////////////
// The NetworkSpeed class, used to get network speed

NetworkSpeed::NetworkSpeed(QObject *parent) : QObject(parent) {}

int NetworkSpeed::getCurrentDownloadRates(char *netname, long *save_rate, long *tx_rate)
{
    FILE *net_dev_file; //文件指针
    char buffer[1024];  //文件中的内容暂存在字符缓冲区里
    // size_t bytes_read; //实际读取的内容大小
    char *match; //用以保存所匹配字符串及之后的内容
    int counter = 0;
    // int i = 0;
    char tmp_value[128];

    if ((NULL == netname) || (NULL == save_rate) || (NULL == tx_rate)) {
        qDebug() << "parameter pass error";
        return -1;
    }

    if ((net_dev_file = fopen("/proc/net/dev", "r")) == NULL) { //打开文件/pro/net/dev/，从中读取流量数据
        qDebug() << "error occurred when try to open file /proc/net/dev/";
        return -1;
    }
    memset(buffer, 0, sizeof(buffer));

    while (fgets(buffer, sizeof(buffer), net_dev_file) != NULL) {
        match = strstr(buffer, netname);

        if (NULL == match) {
            // qDebug()<<"No eth0 keyword to find!";
            continue;
        } else {
            match = match + strlen(netname) + strlen(":"); //地址偏移到冒号
            sscanf(match, "%ld ", save_rate);
            memset(tmp_value, 0, sizeof(tmp_value));
            sscanf(match, "%s ", tmp_value);
            match = match + strlen(tmp_value);
            for (size_t i = 0; i < strlen(buffer); i++) {
                if (0x20 == *match) {
                    match++;
                } else {
                    if (8 == counter) {
                        sscanf(match, "%ld ", tx_rate);
                    }
                    memset(tmp_value, 0, sizeof(tmp_value));
                    sscanf(match, "%s ", tmp_value);
                    match = match + strlen(tmp_value);
                    counter++;
                }
            }
        }
    }

    return 0; //返回成功
}
